非理想条件下MMC-DVR的Lyapunov控制策略研究  

Research on Lyapunov control strategy of an MMC-DVR under non-ideal conditions

作　　者：王函韵 周雅婷 程启明 谢怡群 叶培乐 WANG Hanyun;ZHOU Yating;CHENG Qiming;XIE Yiqun;YE Peile(State Grid Zhejiang Huzhou Power Supply Company,Huzhou 313098,China;College of Automation Engineering,Shanghai University of Electric Power,Shanghai 200090,China)

机构地区：[1]国网浙江湖州供电公司,浙江湖州313098 [2]上海电力大学自动化工程学院,上海200090

出　　处：《电力系统保护与控制》2023年第2期22-33,共12页Power System Protection and Control

基　　金：国家自然科学基金项目资助(61905139)。

摘　　要：动态电压调节器(DVR)与模块化多电平转换器(MMC)组合的MMC-DVR可用于解决中高电压的动态电压补偿问题。目前MMC-DVR基本采用PID等线性控制方法,而MMC-DVR为非线性系统,因而其控制效果并不能令人满意。为此,提出了针对非理想条件下MMC-DVR系统的非线性李雅普诺夫(Lyapunov)控制方法来解决此问题。首先,建立MMV-DVR的数学建模。接着,设计了非理想条件下正、负序MMC-DVR的Lyapunov控制系统。最后,通过实验验证了所提的Lyapunov控制方法用于MMC-DVR的正确性和有效性。与传统PID控制相比,Lyapunov控制方法的电压在理想、非理想的多种不同工况下都能得到很好的补偿,且系统的动态响应更快、鲁棒性更强。An MMC-DVR is a combination of dynamic voltage regulator(DVR)and modular multilevel converter(MMC).It can be used to solve the problem of dynamic voltage compensation for medium and high voltage.At present,linear control methods such as PID are basically used in MMC-DVR,but an MMC-DVR is a nonlinear system,so its control effect is not satisfactory.Therefore,a nonlinear Lyapunov control method for an MMC-DVR system under non ideal conditions is proposed.First,the mathematical model of an MMC-DVR is established.Then,the Lyapunov control systems of positive and negative sequence MMC-DVR under non-ideal conditions are designed.Finally,the correctness and effectiveness of the proposed Lyapunov control method for the MMC-DVR are verified by experiment.Compared with traditional PID control,the proposed Lyapunov control method can obtain good voltage compensation under ideal and non-ideal conditions,and the system has faster dynamic response and is more robust.

关 键 词：动态电压调节器 模块化多电平转换器 Lyapunov控制 非理想条件 PID控制 

分 类 号：TM614[电气工程—电力系统及自动化] TP273[自动化与计算机技术—检测技术与自动化装置]